looks like @
davez has reached enlightenment regarding his ILI-ness lol
The Reinin trait of Decisive is not the same as dictionary definition of the word "decisive". In terms of dichotomies, Decisive doesn't mean "certain" or "assured", but rather it refers to differences in mobilization cycles and in stages of the process of decision making (and as it has already been said, eventually even ILIs have to decide on something):
http://www.the16types.info/vbulletin...in-Dichotomies
This link gives a few examples of Decisive types saying things like they have trouble relaxing and going into demobilized state, and this is something I've seen with Ni-ego types, ILIs included. Seems like they have trouble feeling a kind of heaviness and tiredness in their body, and may be unable to relax and go to sleep after a significant work load, exercise and wear themselves out until they drop from exhaustion, etc. An ILI I knew back in college would stay up and play video games up to early morning after finishing his final exams, then collapse and sleep well into mid-day on Saturday. He also wouldn't begin studying until the last moment, usually carefully calculating his time resources before the exam. Another ILI, of intuitive subtype, had trouble with his sleep cycle constantly resetting itself, so he would sometimes be sleeping days and sometimes sleeping at nights. These could be examples of what this dichotomy is attempting to describe.
The names of the Reinin traits should be not translated literally (@Iris), it's better to read through their descriptions from the link above.